The Porsche 718 Cayman is one of the purest driver's cars in the marketplace, a rare thing in an industry that has embraced SUVs and is racing toward a future of autonomous driving. Cayman's mid-engine layout approaches near-perfect balance for track driving, but this car's modern appointments and good fuel economy make it well-suited for commuter duty, too. New for 2020 is the GT4, with a sonorous six-cylinder engine.